search_flexible_dates

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Despite no annotations, the description discloses that it runs one search per candidate date (throttled), a key behavioral trait. It also advises keeping ranges reasonable, implying rate limits. No contradictions.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is concise with a brief intro and structured parameter list. Every sentence adds value, and the purpose is front-loaded. No unnecessary text.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the complexity (13 parameters, output schema exists), the description covers all parameters and usage intent. It lacks details on error handling or empty results, but the output schema likely covers return structure.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The description provides detailed explanations for all 13 parameters in the 'Args' section, compensating for the 0% schema coverage. It clarifies defaults and special values (e.g., trip_length_days=0 for one-way).

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool finds the cheapest departure day over a date range, with a specific use case for flexible holiday planning. It distinguishes from siblings like search_flights (fixed dates) and compare_destinations.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description advises when to use ('ideal for flexible holiday planning') and warns about performance ('keep ranges reasonable'). It implies not to use for fixed dates, but does not explicitly name alternatives.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.